CN211674510U - Kirschner wire drill clamping assembly and Kirschner wire drill chuck - Google Patents

Abstract

The utility model discloses a clamping assembly of a Kirschner wire drill and a Kirschner wire drill chuck, wherein the clamping assembly comprises a chuck body, clamping fingers and an elastic locking structure, and the chuck body is provided with a Kirschner wire mounting hole and clamping finger guide holes; the clamping fingers are slidably arranged in the clamping finger guide holes and are used for clamping the Kirschner wire in the Kirschner wire mounting hole; the elastic locking structure is used for providing elastic force for driving the Kirschner wire to be pressed on the hole wall of the Kirschner wire mounting hole, and the elastic locking structure is arranged on the chuck body. The utility model discloses a kirschner wire bores clamping component and kirschner wire drill chuck is through setting up elasticity locking structure, makes the kirschner wire in the kirschner wire mounting hole receive all the time and orders about the kirschner wire compresses tightly the elastic force on the pore wall of kirschner wire mounting hole can avoid the kirschner wire to deviate from when avoiding the operator to loosen the arm of force of application, is favorable to improving the reliability of each clamping component and kirschner wire drill chuck.

Description

Kirschner wire drill clamping assembly and Kirschner wire drill chuck

Technical Field

The utility model relates to a medical instrument, concretely relates to kirschner wire bores clamping component and kirschner wire drill chuck.

Background

The Kirschner wire is a commonly used internal fixing material for orthopedics, and during operation, the Kirschner wire is clamped on a drill chuck of the Kirschner wire and is driven by a power element to rotate, so that drilling is realized.

Referring to fig. 1, the conventional kirschner wire drill chuck includes a housing assembly 1, a chuck body 41, clamping fingers 42, a pressing member 2 and an operation assembly, wherein the chuck body 41 and the pressing member 2 are synchronously and rotatably disposed in the housing assembly 1, the clamping fingers 42 are slidably mounted in the chuck body 41, the clamping fingers 42 are uniformly distributed along the circumferential direction of the chuck body 41, and an included angle is formed between the axial direction of each clamping finger 42 and the axial direction of the chuck body 41, so that when the clamping fingers 42 slide in the chuck body 41, the clamping ends of the clamping fingers 42 clamp or loosen the kirschner wire, in the Kirschner wire drill chuck, a pressing piece 2 slides relative to a chuck body 41, a sliding groove for supporting the tail end of a clamping finger 42 is arranged on the pressing piece 2, an operation component comprises a lever arm hinged on a shell component 1, the lever arm comprises a force application arm 31 and a force output arm 32, the force output arm 32 being used to output a pressing force for pressing the pressing element 2 against the end of the gripper finger 42. During the operation, the ke shi needle is located the exposed core of centre gripping finger 42, and the operator is through applying power to application of force arm 31, and power transmits to compressing tightly 2 through power output arm 32, makes to compress tightly 2 and presses at the end of finger, and the ke shi needle is pressed tightly, but the ke shi needle drill chuck is in the transmission process, and the operator loosens application of force arm 31, takes place the condition of ke shi needle roll-off very easily, causes the pollution of cutter easily, brings uncontrollable risk for the operation.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art not enough, the utility model aims to provide a kirschner wire bores clamping component and kirschner wire drill chuck, the kirschner wire roll-off when avoiding the operator to loosen the arm of force of execution improves the reliability.

In order to achieve the above objects and other related objects, the technical solution of the present invention is as follows:

a k-wire drill clamping assembly comprising:

the clamping head body is provided with a Kirschner wire mounting hole and a clamping finger guide hole;

the clamping fingers are arranged in the clamping finger guide holes in a sliding mode and used for clamping the Kirschner wire in the Kirschner wire mounting hole; and

the elastic locking structure is used for providing elastic force for driving the Kirschner wire to be pressed on the hole wall of the Kirschner wire mounting hole, and the elastic locking structure is arranged on the chuck body.

Optionally, the chuck body is provided with one elastic locking structure;

or

The chuck body is provided with a plurality of elastic locking structures, and each elastic locking structure is arranged along the circumferential direction of the chuck body.

Optionally, the elastic locking structure includes:

the guide sliding groove is formed in the chuck body and is communicated with the Kirschner wire mounting hole;

the locking sliding block is arranged in the guide sliding groove in a sliding manner, and the sliding direction of the locking sliding block is close to or far away from the Kirschner wire mounting hole; and

and the elastic piece is used for providing elastic force for driving the locking sliding block to slide towards the direction close to the Kirschner wire mounting hole, one end of the elastic piece is abutted against the locking sliding block, and the other end of the elastic piece is directly or indirectly abutted against the chuck body.

Optionally, the locking slider is provided with:

the pressing surface is used for contacting with the outer wall of the Kirschner wire;

the thrust reversing surface faces the outside of the Kirschner wire mounting hole and is used for inputting thrust of the Kirschner wire to the locking sliding block and converting the direction of the part of the thrust from the axial direction of the Kirschner wire to the sliding direction of the locking sliding block.

Optionally, the guide sliding groove penetrates through the chuck body, so that a sliding groove opening used for being filled into the locking sliding block is formed in the surface of the chuck body, a positioning piece used for blocking the sliding groove opening is integrally arranged on the chuck body, one end of the elastic piece is abutted against the locking sliding block, and the other end of the elastic piece is abutted against the positioning piece.

Optionally, a positioning column is arranged on the positioning part, the elastic part is a cylindrical compression spring, and the elastic part is sleeved outside the positioning column.

Optionally, an elastic piece mounting hole is formed in the locking sliding block, one end of the elastic piece extends into the elastic piece mounting hole, and the other end of the elastic piece abuts against the positioning piece.

Optionally, a positioning piece mounting groove matched with the positioning piece is formed in the chuck body, the positioning piece is a positioning plate, and the positioning piece is welded and fixed in the positioning piece mounting groove.

Optionally, the guide chute is a blind groove with an opening facing the kirschner wire mounting hole, an installation channel for installing the locking slider into the guide chute is formed in the chuck body, and the installation channel is opposite to the opening of the guide chute.

The utility model also provides a kirschner wire drill chuck, include:

a clamping assembly, the chuck being any of the clamping assemblies described above, the clamping assembly being rotatably disposed within the housing assembly,

the pressing piece is used for pressing the tail end of the clamping finger, and a torque transmission structure is arranged between the pressing piece and the chuck body;

the control assembly is used for applying pressing force for pressing the pressing piece on the tail end of the clamping finger; and

a power element mounted on the housing assembly; the power element is used for driving the pressing piece and the clamping assembly to synchronously rotate.

The utility model discloses a kirschner wire bores clamping component and kirschner wire drill chuck is through setting up elasticity locking structure, makes the kirschner wire in the kirschner wire mounting hole receive all the time and orders about the kirschner wire compresses tightly the elastic force on the pore wall of kirschner wire mounting hole can avoid the kirschner wire to deviate from when avoiding the operator to loosen the arm of force of application, is favorable to improving the reliability of each clamping component and kirschner wire drill chuck.

Drawings

FIG. 1 is a schematic structural view of a conventional K-wire drill chuck;

FIG. 2 is a schematic view of the structure of the Kirschner wire drill chuck of the present invention;

FIG. 3 is a schematic view of an exemplary partial internal structure of the K-wire drill chuck of the present invention;

fig. 4 is a schematic diagram illustrating an exemplary structure of the k-wire drill clamping assembly of the present invention;

fig. 5 is a schematic view of another exemplary structure of the k-wire drill clamping assembly of the present invention;

FIG. 6 is an enlarged view of a portion of the locking slide of FIG. 4;

FIG. 7 is a front view of the cartridge body;

FIG. 8 is a sectional view taken along line A-A of FIG. 7;

FIG. 9 is a left side view of FIG. 7;

fig. 10 is a schematic three-dimensional structure of the chuck body.

Part number description:

a shell component 1,

A pressing piece 2,

A force application arm 31, a force output arm 32,

Clamping assembly 4, elastic locking structure 40, clamping head body 41, clamping finger 42, locking slide block 43, elastic piece 44,

A Kirschner wire mounting hole 411, a guide chute 412, a positioning piece 413, a positioning column 413a, a positioning piece mounting groove 414, a mounting channel 415, a clamping finger guide hole 416,

A pressing surface 431, a thrust reversing surface 432 and an elastic piece mounting hole 433.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Referring to fig. 2 and 3 in combination, the clamping assembly of the kirschner wire drill of the utility model is used in the drill chuck of the kirschner wire drill, the Kirschner wire drill chuck comprises a shell component 1, a pressing piece 2, an operating component and a Kirschner wire drill clamping component 4 of the utility model, in the Kirschner wire drill chuck, a clamping component 4 and a pressing piece 2 are both rotatably arranged in a shell component 1, a torque transmission structure is arranged between the clamping component 4 and the pressing piece 2, a torque transmission structure is also arranged between the pressing piece 2 and a power element, so that the clamping component 4 and the pressing piece 2 synchronously rotate, a control component comprises a lever arm hinged on the shell component 1, the lever arm comprises a force application arm 31 and a force output arm 32, the force output arm 32 being used to output a pressing force for pressing the pressing member 2 against the end of the gripping finger 42, which, during operation, by holding the force applying arm 31 and applying a force to the force applying arm 31, the force output arm 32 can press the pressing member 2 against the end of the holding finger 42. The end of the holding finger 42 is the end far from the holding end of the holding finger 42, and in practical implementation, the control assembly may have other structures as long as the pressing force for pressing the pressing member 2 to the end of the holding finger 42 can be applied.

Referring to fig. 3 to 10 in combination, the k-wire drill clamping assembly 4 of the present invention includes:

the fixture body 41 is provided with a Kirschner wire mounting hole 411 and a clamping finger guide hole 416;

a clamping finger 42 slidably disposed in said clamping finger guide hole 416, said clamping finger 42 for clamping the k-wire in said k-wire mounting hole 411; and

and the elastic locking structure 40 is used for providing an elastic force for driving the kirschner wire to be pressed on the hole wall of the kirschner wire mounting hole 411, and the elastic locking structure 40 is arranged on the chuck body 41.

During operation, under the pressing force of the pressing piece 2, the tail end of the clamping finger 42 is abutted against the pressing piece 2, the clamping end of the clamping finger 42 is pressed on the surface of the kirschner wire in the kirschner wire mounting hole 411, at the moment, the stress of the kirschner wire is provided with the clamping force applied by the clamping finger 42 and the elastic force applied by the elastic locking structure 40, and the kirschner wire is locked in the kirschner wire mounting hole 411 under the combined action of the clamping force and the elastic force; when the operator releases the force applying arm 31 (for example, when the kirschner wire drill is transferred), the pressing member 2 does not apply pressure to the kirschner wire in the kirschner wire mounting hole 411 any more, and the kirschner wire receives only the elastic force applied by the elastic locking structure 40, and the kirschner wire is locked in the kirschner wire mounting hole 411 under the action of the elastic force and does not fall out of the kirschner wire mounting hole 411.

In some embodiments, referring to fig. 3, 4, 7 to 10 in combination, a plurality of elastic locking structures 40 are provided on the chuck body 41, and each elastic locking structure 40 is arranged along the circumferential direction of the chuck body 41, so that when an operator releases the force applying arm 31, the elastic locking structure 40 locks the kirschner wire in the center of the kirschner wire mounting hole 411, and in the figures, 3 elastic locking structures 40 are provided; in other embodiments, referring to fig. 5, the chuck body 41 is provided with the elastic locking structure 40, so that when the operator releases the force applying arm 31, the elastic locking structure 40 presses the k-wire against the hole wall of the k-wire mounting hole 411.

In some embodiments, referring to fig. 3-5 in combination, the resilient locking structure 40 comprises:

a guide chute 412 which is provided in the chuck body 41, and the guide chute 412 is communicated with the kirschner wire mounting hole 411;

a locking slider 43 slidably disposed in the guide chute 412, wherein the sliding direction of the locking slider 43 is a direction approaching or departing from the kirschner wire installation hole 411; and

and the elastic piece 44 is used for providing an elastic force for driving the locking slide block 43 to slide towards the direction close to the kirschner wire installation hole 411, one end of the elastic piece 44 abuts against the locking slide block 43, and the other end of the elastic piece 44 abuts against the chuck body 41 directly or indirectly.

With the elastic locking structure 40, no matter during operation or when the operator releases the force applying arm 31, the locking slider 43 will be abutted against the surface of the kirschner wire under the action of elastic force, and when the kirschner wire needs to be taken out, the operator is required to apply a force to the kirschner wire to overcome the friction force between the locking slider 43 and the kirschner wire.

In some embodiments, referring to fig. 3, 4, 5 and 6 in combination, the locking slider 43 is provided with:

a compression surface 431 for contacting the outer wall of the k-wire;

and the thrust reversing surface 432 faces the outside of the Kirschner wire mounting hole 411, and the thrust reversing surface 432 is used for inputting the thrust of the Kirschner wire to the locking slider 43 and converting the direction of the part of the thrust from the axial direction of the Kirschner wire to the sliding direction of the locking slider 43.

When the kirschner wire is taken out, the locking slide block 43 further extends into the mounting hole 411 of the kirschner wire under the action of the elastic force of the elastic piece 44, and the locking slide block 43 is blocked on the path for mounting the kirschner wire; when the kirschner wire is installed, the inner end of the kirschner wire abuts against the thrust reversing surface 432 to push the kirschner wire, the locking slide block 43 can slide along the direction far away from the mounting hole 411 of the kirschner wire by overcoming the elastic force of the elastic piece 44 until the locking slide block 43 does not block the insertion path of the kirschner wire any more, and the pressing surface 431 of the locking slide block 43 is pressed tightly on the surface of the kirschner wire. Here, the thrust reversal face 432 is provided so that the k-wire can be smoothly inserted into the k-wire mounting hole 411.

In some embodiments, referring to fig. 4 and fig. 7 to fig. 10, the guide sliding groove 412 penetrates through the chuck body 41, so that a sliding groove opening for accommodating the locking slider 43 is formed on the surface of the chuck body 41, a positioning element 413 blocked at the sliding groove opening is integrally arranged on the chuck body 41, one end of the elastic element 44 abuts against the locking slider 43, and the other end abuts against the positioning element 413.

In some embodiments, referring to fig. 4 and fig. 7 to fig. 10 in combination, a positioning column 413a is disposed on the positioning element 413, the elastic element 44 is a cylindrical compression spring, the elastic element 44 is sleeved outside the positioning column 413a, and the positioning column 413a is disposed to help limit the axial position of the elastic element 44, so as to improve the reliability of the entire elastic locking structure 40.

In some embodiments, referring to fig. 4, 7 to 10, an elastic member 44 mounting hole is disposed on the locking slider 43, one end of the elastic member 44 extends into the elastic member 44 mounting hole, and the other end abuts against the positioning member 413.

In some embodiments, referring to fig. 4, 7 to 10, a positioning member installation groove 414 is formed on the chuck body 41, the positioning member 413 is a positioning plate, and the positioning member 413 is welded and fixed in the positioning member installation groove 414.

In other embodiments, referring to fig. 5, the guide sliding groove 412 is a blind groove with an opening facing the kirschner wire mounting hole 411, and the chuck body 41 is provided with a mounting channel 415 for mounting the locking slider 43 into the guide sliding groove 412, and the mounting channel 415 faces the opening of the guide sliding groove 412.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include both the first and second features being in direct contact, and may also include the first and second features being in contact, not being in direct contact, but rather being in contact with each other via additional features between them. The third feature being "between" the first and second features may include the third feature being in direct contact with the first and second features, or the third feature being in contact with the first and second features, not directly, but via another feature therebetween.

In the description of the invention, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, components, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, and/or groups thereof.

Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. A k-wire drill clamping assembly, comprising:

the clamping head body is provided with a Kirschner wire mounting hole and a clamping finger guide hole;

the clamping fingers are arranged in the clamping finger guide holes in a sliding mode and used for clamping the Kirschner wire in the Kirschner wire mounting hole; and

the elastic locking structure is used for providing elastic force for driving the Kirschner wire to be pressed on the hole wall of the Kirschner wire mounting hole, and the elastic locking structure is arranged on the chuck body.

2. The k-wire drill clamping assembly of claim 1, wherein: the chuck body is provided with the elastic locking structure;

or

The chuck body is provided with a plurality of elastic locking structures, and each elastic locking structure is arranged along the circumferential direction of the chuck body.

3. The k-wire drill clamping assembly of claim 1, wherein the resilient locking structure comprises:

the guide sliding groove is formed in the chuck body and is communicated with the Kirschner wire mounting hole;

the locking sliding block is arranged in the guide sliding groove in a sliding manner, and the sliding direction of the locking sliding block is close to or far away from the Kirschner wire mounting hole; and

and the elastic piece is used for providing elastic force for driving the locking sliding block to slide towards the direction close to the Kirschner wire mounting hole, one end of the elastic piece is abutted against the locking sliding block, and the other end of the elastic piece is directly or indirectly abutted against the chuck body.

4. The k-wire drill clamping assembly of claim 3, wherein: the locking slide block is provided with:

the pressing surface is used for contacting with the outer wall of the Kirschner wire;

the thrust reversing surface faces the outside of the Kirschner wire mounting hole and is used for inputting thrust of the Kirschner wire to the locking sliding block and converting the direction of the part of the thrust from the axial direction of the Kirschner wire to the sliding direction of the locking sliding block.

5. The k-wire drill clamping assembly of claim 3, wherein: the guide sliding groove penetrates through the chuck body, so that a sliding groove opening used for being filled into the locking sliding block is formed in the surface of the chuck body, a positioning piece used for blocking the sliding groove opening is integrally arranged on the chuck body, one end of the elastic piece is abutted against the locking sliding block, and the other end of the elastic piece is abutted against the positioning piece.

6. The k-wire drill clamping assembly of claim 5, wherein: the positioning piece is provided with a positioning column, the elastic piece is a cylindrical compression spring, and the elastic piece is sleeved outside the positioning column.

7. The k-wire drill clamping assembly of claim 5, wherein: an elastic piece mounting hole is formed in the locking sliding block, one end of the elastic piece extends into the elastic piece mounting hole, and the other end of the elastic piece abuts against the positioning piece.

8. The k-wire drill clamping assembly of claim 5, wherein: the fixture comprises a fixture body and is characterized in that a positioning piece mounting groove matched with the positioning piece is formed in the fixture body, the positioning piece is a positioning plate, and the positioning piece is welded and fixed in the positioning piece mounting groove.

9. The k-wire drill clamping assembly of claim 3, wherein: the guide sliding groove is a blind groove with an opening facing the Kirschner wire mounting hole, a mounting channel for mounting the locking sliding block into the guide sliding groove is formed in the chuck body, and the mounting channel is opposite to the opening of the guide sliding groove.

10. A K-wire drill chuck, comprising:

a housing assembly:

a clamping assembly as claimed in any one of claims 1 to 9, the clamping assembly being rotatably disposed within the housing assembly,

the pressing piece is used for pressing the tail end of the clamping finger, and a torque transmission structure is arranged between the pressing piece and the chuck body;

the control assembly is used for applying pressing force for pressing the pressing piece on the tail end of the clamping finger; and

a power element mounted on the housing assembly; the power element is used for driving the pressing piece and the clamping assembly to synchronously rotate.

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